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  1. Service Packs and Hot Fixes
  2. MNT-6968

Inbound email supports STARTTLS by default - however this requires Java + SSL configuration to be done to work


    • Type: Service Pack Request
    • Status: Closed (View Workflow)
    • Priority: Critical
    • Resolution: Fixed
    • Affects Version/s: 3.2 R
    • Fix Version/s: 4.0
    • Component/s: Repository
    • Labels:
    • ACT Numbers:



      Inbound email supports STARTTLS by default - however this requires Java + SSL configuration to be done to work.

      Basically when you connect to the inbound subethamail ESMTP service it reports it supports STARTTLS:

      [root@ts1 ~]# telnet 0 2525
      Connected to 0 (
      Escape character is '^]'.
      220 ts.alfresco.com ESMTP SubEthaSMTP
      EHLO foo
      250 Ok

      However if the user has not configured Java + SSL in his JVM as described here: http://stilius.net/java/java_ssl.php

      STARTTLS negotiation will fail. The java logs show:

      12:23:09,349 DEBUG [org.subethamail.smtp.server.ConnectionHandler] SMTP connection count: 1
      12:23:09,351 DEBUG [org.subethamail.smtp.server.ConnectionHandler] Server: 220 ts.alfresco.com ESMTP SubEthaSMTP
      12:23:09,486 DEBUG [org.subethamail.smtp.server.ConnectionHandler] Client: EHLO mx-out-manc3.simplymailsolutions.com
      12:23:09,487 DEBUG [org.subethamail.smtp.server.ConnectionHandler] Server: 250-ts.alfresco.com
      250 Ok
      12:23:09,504 DEBUG [org.subethamail.smtp.server.ConnectionHandler] Client: STARTTLS
      12:23:09,504 DEBUG [org.subethamail.smtp.server.ConnectionHandler] Server: 220 Ready to start TLS
      12:23:10,075 WARN [org.subethamail.smtp.command.StartTLSCommand] startTLS() failed: no cipher suites in common
      javax.net.ssl.SSLHandshakeException: no cipher suites in common
      at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Alerts.java:174)
      at com.sun.net.ssl.internal.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1611)
      at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Handshaker.java:187)
      at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Handshaker.java:177)
      at com.sun.net.ssl.internal.ssl.ServerHandshaker.chooseCipherSuite(ServerHandshaker.java:638)
      at com.sun.net.ssl.internal.ssl.ServerHandshaker.clientHello(ServerHandshaker.java:425)
      at com.sun.net.ssl.internal.ssl.ServerHandshaker.processMessage(ServerHandshaker.java:139)
      at com.sun.net.ssl.internal.ssl.Handshaker.processLoop(Handshaker.java:516)
      at com.sun.net.ssl.internal.ssl.Handshaker.process_record(Handshaker.java:454)
      at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:884)
      at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1112)
      at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1139)
      at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1123)
      at org.subethamail.smtp.command.StartTLSCommand.execute(StartTLSCommand.java:57)
      at org.subethamail.smtp.server.CommandHandler.handleCommand(CommandHandler.java:58)
      at org.subethamail.smtp.server.ConnectionHandler.run(ConnectionHandler.java:113)
      12:23:10,076 DEBUG [org.subethamail.smtp.server.ConnectionHandler] Server: 450 Problem attempting to execute commands. Please try again later.
      12:23:10,076 DEBUG [org.subethamail.smtp.server.ConnectionHandler] java.net.SocketException: Socket closed

      I have logged DOC-137 to include the SSL config as a doc note or whatever. I've also updated the wiki here: http://wiki.alfresco.com/wiki/Inbound_Email_Server_Configuration#StartTLS_Support

      I've raised this ticket as a behavioural change suggestion. I figure STARTTLS should be disabled by default, and users should have the option to turn it on in a properties file if they so require it. This would avoid the extra configuration. STARTTLS is not mandatory and most mail servers will happily send email with clear text.

      Also - if possible - regardless of what the user sets - the SMTP service should not report STARTTLS if it knows SSL has not been configured.

      Let me know if this doesn't make sense.


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              • Assignee:
                closedbugs Closed Bugs
                sashcraft Scott Ashcraft
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